Fix shared-bot Telegram agent resolution and add effort badge

- TelegramService: build the chat context with the session owner instead
  of the bot owner, so a public/shared bot resolves the agent for foreign
  sessions; credentials/CLI permission stay with the bot owner.
- Agent cards: render an effort badge next to the model badge when an
  agent has an explicit reasoning effort set.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Services/TelegramService.cs

@@ -164,7 +164,10 @@ public class TelegramService
 
     private async Task HandleMessage(long chatId, string userText, string botToken, string botUserId, SessionRecord session)
     {
-        var ctx = await _chatService.PrepareContext(session.SessionId, botUserId, _settings.GetInt("MaxIterations", 100));
+        // Kontext mit dem Session-Besitzer aufbauen, nicht mit dem Bot-Besitzer:
+        // bei einem geteilten Bot können sich beide unterscheiden, und PrepareContext
+        // lehnt fremde Sessions ab. Credentials/CLI-Berechtigung bleiben beim Bot-Besitzer (botUserId, s.u.).
+        var ctx = await _chatService.PrepareContext(session.SessionId, session.UserId, _settings.GetInt("MaxIterations", 100));
         if (ctx == null)
         {
             await SendMessage(chatId, botToken, "❌ Kein Agent konfiguriert. Bitte weise der Session im Web-UI einen Agent zu.");

wwwroot/css/dashboard.css

@@ -121,6 +121,12 @@
   color: var(--secondary);
 }
 
+.badge-effort {
+  background: rgb(from var(--info) r g b / .1);
+  border-color: rgb(from var(--info) r g b / .25);
+  color: var(--info);
+}
+
 .section-add-btn {
   font-size: var(--font-size);
 }

wwwroot/js/cards.js

@@ -153,12 +153,15 @@ function buildAgentCard(agent, skills) {
     }
   }
 
+  const effort = (agent.effort || ``).toLowerCase()
+
   card.innerHTML = `
     <div class="card-image">${imageHtml}</div>
     <div class="card-body">
       <div class="card-title-row">
         <span class="card-title">${esc(agent.name)}</span>
         <span class="badge">${prettyModelName(agent.model)}</span>
+        ${effort ? `<span class="badge badge-effort">${effort}</span>` : ``}
       </div>
       ${badges.length ? `<div class="card-badges">${badges.join('')}</div>` : ''}
     </div>